You have a numeric variable that records the number of college credits a person has earned. You want to create a user-defined missing value for person's whose college records were unavailable. Which of the following would be the best user-defined missing value to use?
A) −1
B) 0
C) 99
D) 250

Question

Quizplus · Accepted Answer

Using a value of -1 is a common practice for indicating missing or unavailable data, especially when dealing with counts or quantities where negative values are otherwise invalid or nonsensical. In this context, 0 could imply no credits earned, and 99 and 250 could be mistaken for actual credit counts.

You Have a Numeric Variable That Records the Number of College